Place garlic on a piece of foil, at least 6" by 6". Pour ¼ tsp. olive oil over garlic and season with a small pinch of salt. Bring foil corners together and scrunch to form a pouch. Place pouch on prepared baking sheet and bake in oven until garlic is soft, about 12-15 minutes. Remove from oven and allow to cool down. Reserve baking sheet for future step. Smash roasted garlic with the side of a knife or just mince it. In a small bowl, stir together smashed garlic, softened butter, and a pinch of salt and pepper. Set aside.